let s = 'hello'
let n = 123
let f = true
let b = null
let m = Symbol('123')
let o = {a:1}
let a = [1,2,3]
let d = new Date()
let f1 = function(){}
let map = new Map()
let set = new Set()

console.log(s instanceof String)
console.log(n instanceof Number)
console.log(f instanceof Boolean)
console.log(b instanceof Object)
console.log(m instanceof Symbol)
console.log(o instanceof Object)
console.log(a instanceof Array)
console.log(d instanceof Date)
console.log(f1 instanceof Function)
console.log(map instanceof Map)
console.log(set instanceof Set)
